solve() "Unable to find explicit solution"
14 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Using solve for an equation is not working and I'm not sure why. This has an explicit solution but it doesn't work. What am I missing?
syms g m L s Y(s)
solve(- m*(s - s^2*Y(s) + 1)*L^2 + g*m*Y(s)*L == 0,Y(s))
0 commentaires
Réponse acceptée
Dyuman Joshi
le 13 Oct 2023
solve() expects the 2nd input to be an array of symbolic variable(s), where as you have defined Y as a symbolic function.
If you want to get the output as a function of "s", define it accordingly -
syms g m L s Z
Y(s) = solve(- m*(s - s^2*Z + 1)*L^2 + g*m*Z*L == 0,Z)
Plus de réponses (2)
Walter Roberson
le 13 Oct 2023
(I am absolutely positive I had already answered this, but there is no trace of that...)
solve() cannot solve for functions. You will need to substitute a symbolic variable for the function. For example,
syms g m L s Y(s) Ys
eqn = - m*(s - s^2*Y(s) + 1)*L^2 + g*m*Y(s)*L == 0;
solve( subs(eqn, Y(s), Ys), Ys)
Voir également
Catégories
En savoir plus sur Assumptions dans Help Center et File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!